This jerk is interferring with the interstate commerce. He is prohibiting the interstate sales and delivery of a legal product and the courts should shoot this down.
The again, I'm sure our politically charged courts will discover a penumbra floating around Saturn that allows another chunk of our freedom being subverted by a fascist attorney general.
While I agree with your sentiments - I don't see how the courts can do anything, this is a "voluntary agreement" between a private entity and the AG (much like the MSA)